Carburizing Furnace Manufacturer India, Carburizing process guide

Carburizing is a thermochemical process in which carbon is diffused into the surface of low carbon steels to increase the carbon content to sufficient levels so that the surface will respond to heat treatment and produce a hard, wear-resistant layer. Carburizing process known as case hardening where the outer layer of the material is hardened by diffusion of carbon atoms on the top layer of the material while inner layer remains soft. A carburizing furnace allows material to be a heated at above 900°C  upto 1100°C and then all the oxygen and contaminants are pumped out using a vacuum pump and then carbon rich gas is introduced into the furnace to allow carbon diffusion on the metal surface. Maan Global Industries is the leading carburizing furnace manufacturer in India.

carburizing furnace manufacturer

Video Explaining case carburization Process

Types of Carburizing Furnace Manufacturer

Carburizing furnace manufacturer in India, design and manufacture custom carburizing furnace depending on the application and carburizing process. There are several different types of carburizing furnaces, let’s understand them in detail below:

Electric Pit Carburizing Furnace Manufacturer in India

electric carburizing furnace

Type of Furnace Electric Carburizing furnace
Material Loading Capacity 500-1500 kg
Brand MGI
Carburizing Process Gas Carburizing
Power 120 kW
Max Temperature 500-1000 degree Celsius
Size 900 Dia x 1200 mm Depth
Minimum Order Quantity 1 Unit

The electric pit furnace offers a unique combination of big performance and low maintenance at temperatures up to 1200°C. 

Key Specifications of Electric Pit Carburizing Furnace

  • Temperature Range: to 1200°C
  • Inert or Combustible Atmosphere Capable
  • Low power consumption and fast cycle times. 

Gas Fired Pit Type Carburizing Furnace Manufacturer Kolkata, Odisha, Bangalore, Chennai

Type of Furnace Gas Fired Pit Type carburizing furnace
Material Loading Capacity (T) 1500 Kg
Heat Source Gas Fired
Type Of Furnace Carburizing
Gas Capacity 34,417 kcal/h
Max Operating Temperature 1200 Degree Celsius
Automation Grade Semi-Automatic
Brand MGI
Country of Origin Made in India
Usage Gear Heat Treatment, Lower Link Heat Treatment and Others

Horizontal Carburizing Furnace Manufacturer for Special Purpose

Power Source Electric
Type Of Furnace Fix Horizontal Type Carburizing Furnace
Max Temperature 500-1200 Degree Celsius
Usage/Application Industrial
Material Loading Capacity 200-800 kg
Automation Grade Semi-Automatic
Brand MGI
Process Material Mild Steel, Alloys

carburizing process

Electric Pit Type Carburizing Furnace with Integrated Washing Line

Type of Furnace Electric Carburizing furnace with Washing Line
Material Loading Capacity 500-1200 kg
Brand MGI
Carburizing Process Gas Carburizing
Power 140 kW
Washing Line Automatic Washing, Degreasing of Quenched Parts
Max Temperature 500-1000 degree Celsius
Size 1150 Dia x 2500 mm Depth
Minimum Order Quantity 1 Unit

Electric Tempering Furnace Manufacturer India

Type of Furnace Electric Tempering furnace
Material Loading Capacity 500-1500 kg
Brand MGI
Heat Treatment Process Tempering
Power 80 kW
Max Temperature 500-850 degree Celsius
Size 900 Dia x 1200 mm Depth
Minimum Order Quantity 1 Unit

Video Showing Carburizing Heat Treatment Line – Pit Type Carburization Furnace Manufacturer Mumbai, Pune, Hyderabad, Delhi

What is Carburizing Process and what are different types of carburizing process and How it is done?

All three processes rely on the transformation of austenite into martensite on quenching. The increase in carbon content at the surface must be high enough to give a martensitic layer with sufficient hardness, typically 700HV, to provide a wear-resistant surface. The required carbon content at the surface after diffusion is usually 0.8 to 1.0%C. These processes can be carried out on a wide range of plain carbon steels, alloy steels and cast irons where the bulk carbon content is a maximum of 0.4% and usually less than 0.25%. Incorrect heat treatment can lead to oxidation or de-carburization. Although a relatively slow process, carburizing can be used as a continuous process and is suitable for high volume, surface hardening.

Gas carburizing

In gas carburizing, the component is held in a furnace containing an atmosphere of methane or propane with a neutral carrier gas, usually a mixture of N2, CO, CO2, H2 and CH4. At the carburizing temperature, methane (or propane) decomposes at the component surface to atomic carbon and hydrogen, with the carbon diffusing into the surface. The temperature is typically 925°C and carburizing times range from 2 hours for a 1mm depth case to a maximum of around 36 hours for a 4mm case. The quenching medium is usually oil, but can be water, brine, caustic soda or polymer.

Liquid carburizing or cyaniding

Liquid carburizing or cyaniding is carried out by placing the component in a salt bath at a temperature of 845°C to 955°C. The salt is usually a cyanide-chloride-carbonate mixture and is highly toxic. The cyanide salts introduce a small amount of nitrogen into the surface which further improves its hardness. Although the fastest carburizing process, it is suitable only for small batch sizes.

Solid carburizing

In solid or pack carburizing, the components are surrounded by a carburizing medium and placed in a sealed box. The medium is usually coke or charcoal mixed with barium carbonate. The process is really one of gas carburization since the CO produced dissociates into CO2 and carbon which diffuses into the components’ surface. Temperatures are usually 790 to 845°C for times of 2 to 36 hours. Pack carburizing is the least sophisticated carburizing process and as a result remains a widely used method.

Carbonitriding

Carbonitriding is undertaken on a similar range of steels although the bulk carbon content can be as high as 0.4 to 0.5%. The process is particularly suited for hardening the surface of components that need a through-hardened core, such as gears and shafts. Carbonitriding is a modification of gas carburization where ammonia is added to the methane or propane and is the source of nitrogen.

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Carburizing Furnace Manufacturer India, Carburizing process guide

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